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A series of uncharged, anionic, cationic, and heparinized polyetherurethanes(PEUs) was synthesized. The soft segments of these PEUs were respectively obtained by polyte-tramethylene oxide of molecular weight 1000 (PTMO-1000), polythylene glycol of molecularweight 1000 (PEG-1000), PEG-4000, and the mixture of PEG-4000 with PTMO-1000 orPEG-1000. The hard segments consisted of 4,4’ -methylene diphenylene diisocyanate (MDI)which was extended with ethylenediamie (ED), 1,4Mbutanediol (BD), N-methyldiethanolamine(MDEA), or L-Sodium α,ε-diaminocaproate (SDAC), respectively. The chemical structure of different PEUs was confirmed by nuclear magnetic resonance. Waterabsorptions were measured. The results showed that the ionic, heparinized PEUs, and the PEUscontained PEG-4000 as soft segments have higher water absorptions than ordinary PEUs. ThePEUs based mainly on PEG-4000 as soft segments are a kind of high hydroscopic polymer mate-rials, and their hydroscopicity increases with PEG-4000 in soft segment.
A series of uncharged, anionic, cationic, and heparinized polyetherurethanes (PEUs) was synthesized. The soft segments of these PEUs were individually obtained by polyte- tramethylene oxide of molecular weight 1000 (PTMO-1000) 1000), PEG-4000, and the mixture of PEG-4000 with PTMO-1000 or PEG- 1000. The hard segments consisted of 4,4’-methylene diphenylene diisocyanate (MDI) which was extended with ethylenediamie (ED) (BD), N-methyldiethanolamine (MDEA), or L-Sodium α, ε-diaminocaproate (SDAC), respectively. The chemical structure of different PEUs was confirmed by nuclear magnetic resonance. Waterabsorptions were measured. heparinized PEUs, and the PEUscontained PEG-4000 as soft segments have higher water absorptions than ordinary PEUs. The PEUs based mainly on PEG-4000 as soft segments are a high of hydroscopic polymer mate- rials, and their hydroscopicity increases with PEG-4000 in sof t segment.